Stereotype-plate holder



(No Model.)

W. G. SLAUSON.

STEREOTYPE PLATE HOLDER.

No. 398,852. Patented Mar. 5, 1889.

VZ A 55E5 UNITE STATES PATENT OFFICE.

XVILLIAM G. SLAI SON, OF MIDDLETOlYX, NEWY YORK.

STEREOTYPE-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 398,852, dated March 5, 1889.

Application filed D cember 27,1887- Serial No. 259,169. (No model.)

T made in sections, the grooves being continuous.

For economy of construction and convenience of use the grooves are preferably cut at I the angle described and at equal distances apart, which will bring them at right angles to each other, thus forming perfect squares.

This invention relates to stereotype, electrotype, printing, and other plate holders; and it consists in. the construction and arrange- 1 will always be a rectangle.

ment of parts necessary to produce a plateholder of the character hereinafter inted out, and described in the claims.

The object of this invention is to produce a 1j)late-holder which may be made of any suitable material, and which maybe either The unit of the holdergrooved in this man ner, whatever may be the angle of the grooves, The grooves will be of equal length in the unit and will meet at the middle of its sides. Sections may consist of one or more of these units.

In holders with continuous grooves a tillerpiece, E or D, maybe passed through the movably attached to a printing-press or may The filler may fill the grooves under the printform a part ot the same for the purpose of holding printing or other plates of any required form or size.

In the drawings, Figure l is a plan view of i a sectional holder having four sections or squares assembled with plates thereon, one plate not being secured. Fig. 2 is a transverse section of a plate-holthn, the plate omitted, showing one form of the filling-bars in section and a catch in elevation. Fig. 3 is a broken section showing a catch in section. Fig. 4; is a section of the spring-follower of the holding-catch. Figs. 5 and 6 are modifications of holding-catches and carriers, Fig. 5 being a plan of the form shown in Fig. 4. Fig. 7 is a cross-section of Fig. 4, and Fig. 8 is a cross-section of a nearly cylindrical [illing-piece without the holding-catch.

A indicates a printil'ig-plate of the ordinary thickness, having beveled edges.

B indicates a section of plate-holder, being the unit of design on which the entire holder is constructed, each unit having face-grooves D at a fixed angle with the side of the same, (the angle in this case being forty-five degrees.) The face-grooves are open at the surface of the holder, but are preferably undercut, as at F, and are formed by slotting perpendicularly to the face of the holder, and then passing a drill, milling, or other proper tool along the slot below the surface in such a way that the under-cutis everywhere at the same distance from the surface of the holder. The grooves pass through the entire holder, which maybe grooves, and if thehold or be composed of several sections the filler will tend to bind them together and hold against lateral strains.

ing-plate,which will then have solid bearings,

T when no amount of pressure can compress the plate into the grooves. The perpendicular slot extends a little deeper than the can larged groove and is narrower, so that the bottom of the cut has a narrow channel running lengthwise thereof, as at S. This fiatbottomed channel will receive the pressure of the set-screw used and prevent the niarring of the grooves.

The filling-pieces E are made high enough to exactly fill the grooves in the holders. They maybe made, however, to merely fit the perpendicular groove, as in Fig. 2, without reference to the under-cut, when the purpose is merely to fill the opening of the groove at the surface.

A setscrew, F, may be passed through the filling-piece when the same enters under the under-cut in the block, and by driving down on the screw the undercut filling-piece will be firmly pressed against the overhang at the upper part of the groove. (See Fig. 3.) This form of filler is used as a holder for the blockclasps.

The filling-piece E may have claws or catches L permanently attached and exten ding above the face of the holder, the clasping-face of the pieces are clamped by driving in set-screws, as shown in Fig. 3.

In Fig.6 I show atwo-sided catch, 31. These catches M havetwo holding sides or hooks, and can be placed between two plates so as to hold both on the holder. The pieces L may be swiveled to the holders or carriers E, as shown at L, and will then accommodate themselves to the sides of an irregular plate. The catch L or M has its edges above the holder in position to correspond with the bevel of the printing-plate. The filler-piece E, which carries the catch, may be in two parts, E E, Fig. 4, with an interposed spring, R. The part E will then yield slightly when secured to the plate. pin E can be held firmly in any position along held against the plate.

is ruled in small squares, preferably to some standard gage, as printers pica, so that the plates may be readily located in their proper places without the necessity of measurement.

On a flat plate the lines will be parallel to its four sides, and on a cylinder they will go with its circumference and across it; in both cases always at right angles to each other, so that the plates can be gaged by the lines, which are numbered, to exact positions on the entire surface and perfect" register secured. \Vhen the spring R is used, it will give a slight elasticity to the holding-catch, and if the-spring be compressed when first adjusted will act as a follower to take up wear.

This block may be made in any number of sections, so as to fill the entire bed of a press, or any portion thereof. The printing-plate can be placed in any position on the pressbed, and by using swiveled catches any form of plate may be held firmly. The perpendicular slot or channel is first enter milled in the block. Then the grooves may be formed with a drill of a little less diameter than the depth of the channel. The drill does not 'quite reach to the bottom of the channel, and

thus has equal resistance on opposite sides and will work evenly.

at; the bottom of the groove receives the ends of the set-screws and will catch small particles, leaving the main groove clean and free from blemishes.

By turning up the screw F the 1 1 upper shoulders of the groove, and a set-screw the line of the groove, and the catch thus The surface of the holder, after being dressed to its desired finish,

The narrow channel 1 2. The combination, with a grooved plateholder, of adjustable and detachable fillingpieces entering said grooves, said filling-pieces resting on the bottom of the grooves and extending to the top of said grooves and being flush with the surface of the block, substantially as described.

3. The combination, with a holder having undercut grooves and a channel at the bottom thereof, of a filling-piece bearing against the passing through the filler and bearing in a channel in the lower portion of the groove.

41A stereotype-plate holder made in sections having a series of intersecting grooves, the unit of'whose design is a rectangular unit of any adopted length and width, each unit having four diagonal grooves across its face, all of equal length, the opposite ones parallel, the grooves meeting at the middle of the respective sides of said unit.

5. The combination, with a holder of the character described having undercut grooves, of a swiveled clasping-piece on a follower in this groove, and a set-screw holding the follower in the groove independently of the claspingpiece.

6. A stereotype-plateholder of the character described, having an enlarged groove and a perpendicular slot extending alittle deeper than said groove, as set forth.

7. A holder having a groove therein, a. twopart follower in the groove, having a holdingcatch thereon, the two parts of the follower being held apart by a spring, and a fastening device for the rear section of the follower, all in combination, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM G. SLAUSON.

Witnesses:

CHAS. J. BOYD, M. D. STIvERs. 

